PHP echo Chinese garbled problem, tried several methods on the Internet or not

echo "Hello" output is garbled, the following are written.

• Add in HTML
• Add header ("Content-type:text/html;charset=utf-8") to PHP;
• Apache configuration file in Adddefaultcharset utf-8

Can still be garbled, what else is possible?

Reply content:

echo "Hello" output is garbled, the following are written.

• Add in HTML
• Add header ("Content-type:text/html;charset=utf-8") to PHP;
• Apache configuration file in Adddefaultcharset utf-8

Can still be garbled, what else is possible?

PHP file encoding must also be set to UTF-8

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